Buggy code:
public void addNewImageWizard ( ) { } public void addNewFontWizard ( ) { } private void refreshRecentMenu ( ) { } private void updateLoadedFile ( ) { } private void initComponents ( ) { } private class FormListener implements ActionListener { FormListener ( ) { } public void actionPerformed ( ActionEvent evt ) { } } public EditableResources getLoadedResources ( ) { } private void addThemeActionPerformed ( ActionEvent evt ) { } private void addFontActionPerformed ( ActionEvent evt ) { } private void addL10NActionPerformed ( ActionEvent evt ) { } private void addDataActionPerformed ( ActionEvent evt ) { } private void removeSelection ( String s ) { } private void removeImageOrAnimation ( String resourceToRemove ) { } public void genericRemoveElement ( String element ) { } private void removeFont ( String f ) { } private void renameItemActionPerformed ( ActionEvent evt ) { } private void addImagesActionPerformed ( ActionEvent evt ) { } private void systemLFMenuActionPerformed ( ActionEvent evt ) { } private void updatePLAF ( String plaf ) { } private void crossPlatformLFMenuActionPerformed ( ActionEvent evt ) { } private void addUserInterfaceActionPerformed ( ActionEvent evt ) { } private void checkDuplicateResourcesLoop ( EditableResources r , String [ ] loadedResourcesArray , String [ ] rArray , String dialogTitle , String resourceTypeName ) { } public void checkDuplicateResourcesLoop ( EditableResources r , String [ ] loadedResourcesArray , String [ ] rArray , String dialogTitle , String resourceTypeName , boolean forceRename ) { } public static void checkDuplicateResourcesLoop ( EditableResources r , String [ ] loadedResourcesArray , String [ ] rArray , String dialogTitle , String resourceTypeName , boolean forceRename , Component cmp ) { } private static void checkDuplicateResources ( EditableResources r , String [ ] loadedResourcesArray , String [ ] rArray , String dialogTitle , String resourceTypeName , String entryName , boolean forceRename , Component cmp ) { } public void importResourceStream ( InputStream is ) throws IOException { } private void importResActionPerformed ( ActionEvent evt ) { } private static void removeCommandDups ( final Map < String , Integer > commandMap , int commandId ) { } private static void initCommandMapAndNameToClassLookup ( final Map < String , String > nameToClassLookup , final Map < String , Integer > commandMap , final List < Integer > unhandledCommands , final List < String [ ] > actionComponentNames , final Map < String , String > allComponents ) { } private File pickJavaSourceLocation ( ) { } public static String normalizeFormName ( String formName ) { } private String camelCaseCommandName ( String cmd ) { } String pickMainScreenForm ( ) { } String generateStateMachineCode ( String uiResourceName , File destFile , boolean promptUserForPackageName ) { } public static String generateStateMachineCodeEx ( String uiResourceName , File destFile , boolean promptUserForPackageName , EditableResources load , Component errorParent ) { } private static String generateStateMachineCodeImpl ( String uiResourceName , File destFile , boolean promptUserForPackageName , EditableResources loadResources , Component errorParent ) { } private static void writeFormCallbackCode ( Writer w , String methodSig , String getString , String prefix , String args , String argDefinition ) throws IOException { } private static void writeFormCallbackCode ( Writer w , String methodSig , String getString , String prefix , String args , String argDefinition , String returnStatement ) throws IOException { } private void deleteUnusedImagesActionPerformed ( ActionEvent evt ) { } private void duplicateItemActionPerformed ( ActionEvent evt ) { } private static boolean configureNetbeans ( ) { } public static void initImagesComboBox ( JComboBox cb , final EditableResources res , boolean asString , final boolean includeNull ) { } public static void initImagesComboBox ( JComboBox cb , final EditableResources res , boolean asString , final boolean includeNull , boolean blockTimelines ) { } private void setupNetbeansActionPerformed ( ActionEvent evt ) { } private void addSVGImagesActionPerformed ( ActionEvent evt ) { } public static void helpVideo ( String url ) { } private void addMultiImagesActionPerformed ( ActionEvent evt ) { } private void pulsateEffectActionPerformed ( ActionEvent evt ) { } private void imageSizesActionPerformed ( ActionEvent evt ) { } private void resPasswordActionPerformed ( ActionEvent evt ) { } static void delTree ( File dir ) { } private void checkerboardColorsActionPerformed ( ActionEvent evt ) { } private void resetNetbeansSettingsActionPerformed ( ActionEvent evt ) { } private void findMultiImagesActionPerformed ( ActionEvent evt ) { } private boolean configureOptiPNG ( ) { String node = Preferences . userNodeForPackage ( ResourceEditorView . class ) . get ( "optiPng" , null ) ; <START_BUG> if ( node == null ) { <END_BUG> JOptionPane . showMessageDialog ( mainPanel , "Please<seq2seq4repair_space>select<seq2seq4repair_space>the<seq2seq4repair_space>OptiPng<seq2seq4repair_space>executable<seq2seq4repair_space>in<seq2seq4repair_space>the<seq2seq4repair_space>following<seq2seq4repair_space>dialog\nOptiPng<seq2seq4repair_space>can<seq2seq4repair_space>be<seq2seq4repair_space>downloaded<seq2seq4repair_space>from<seq2seq4repair_space>http:////optipng.sourceforge.net//" , "Select<seq2seq4repair_space>OptiPNG" , JOptionPane . INFORMATION_MESSAGE ) ; File [ ] result = ResourceEditorView . showOpenFileChooser ( "OptiPng<seq2seq4repair_space>Executable" , "exe" , "app" ) ; if ( result != null ) { Preferences . userNodeForPackage ( ResourceEditorView . class ) . put ( "optiPng" , result [ 0 ] . getAbsolutePath ( ) ) ; return true ; } } else { return true ; } return false ; } private EncodedImage optimize ( EncodedImage img , String exe ) { } private void launchOptiPngActionPerformed ( ActionEvent evt ) { } void aboutActionPerformed ( ) { } private void aboutActionPerformed ( ActionEvent evt ) { } private void signupActionPerformed ( ActionEvent evt ) { } private void loginActionPerformed ( ActionEvent evt ) { } private void addImageMainActionPerformed ( ActionEvent evt ) { } private void addImageAllActionPerformed ( ActionEvent evt ) { } private void addImageSVGActionPerformed ( ActionEvent evt ) { } private void addImageMultiActionPerformed ( ActionEvent evt ) { } private void addImageTimelineActionPerformed ( ActionEvent evt ) { } private void imageBorderWizardMenuItemActionPerformed ( ActionEvent evt ) { } private void setNativeTheme ( String file , boolean local ) { } private void initNativeTheme ( ) { } private void iosNativeThemeActionPerformed ( ActionEvent evt ) { } private void android2NativeThemeActionPerformed ( ActionEvent evt ) { } private void blackberryNativeThemeActionPerformed ( ActionEvent evt ) { } private void customNativeThemeActionPerformed ( ActionEvent evt ) { } private void addNewTimelineActionPerformed ( ActionEvent evt ) { }

Fix:
if ( ( node == null ) || ( ! ( new File ( node ) . exists ( ) ) ) ) {